SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee329ab7aabd753932e33e16a9080d8b4728a1719858e45e293c74fa8b7ce764' 
  AND token = 'wTvFlGbCvfMI+kXOxRG5WExpqs9Zo/uWaZutyovkzS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables